<template>
  <div class="china-map"></div>
</template>

<script>
export default {
  data() {
    return {
      myChart: null,
      geoCoordMap: {
        台湾: [121.5135, 25.0308],
        黑龙江: [127.9688, 45.368],
        内蒙古: [110.3467, 41.4899],
        吉林: [125.8154, 44.2584],
        北京市: [116.4551, 40.2539],
        辽宁: [123.1238, 42.1216],
        河北: [114.4995, 38.1006],
        天津: [117.4219, 39.4189],
        山西: [112.3352, 37.9413],
        陕西: [109.1162, 34.2004],
        甘肃: [103.5901, 36.3043],
        宁夏: [106.3586, 38.1775],
        青海: [101.4038, 36.8207],
        新疆: [87.9236, 43.5883],
        西藏: [91.11, 29.97],
        四川: [103.9526, 30.7617],
        重庆: [108.384366, 30.439702],
        山东: [117.1582, 36.8701],
        河南: [113.4668, 34.6234],
        江苏: [118.8062, 31.9208],
        安徽: [117.29, 32.0581],
        湖北: [114.3896, 30.6628],
        浙江: [119.5313, 29.8773],
        福建: [119.4543, 25.9222],
        江西: [116.0046, 28.6633],
        湖南: [113.0823, 28.2568],
        贵州: [106.6992, 26.7682],
        云南: [102.9199, 25.4663],
        广东: [113.12244, 23.009505],
        广西: [108.479, 23.1152],
        海南: [110.3893, 19.8516],
        上海: [121.4648, 31.2891],
      },
      data: [
        { name: '北京', value: 199 },
        { name: '天津', value: 42 },
        { name: '河北', value: 102 },
        { name: '山西', value: 81 },
        { name: '内蒙古', value: 47 },
        { name: '辽宁', value: 67 },
        { name: '吉林', value: 82 },
        { name: '黑龙江', value: 123 },
        { name: '上海', value: 24 },
        { name: '江苏', value: 92 },
        { name: '浙江', value: 114 },
        { name: '安徽', value: 109 },
        { name: '福建', value: 116 },
        { name: '江西', value: 91 },
        { name: '山东', value: 119 },
        { name: '河南', value: 137 },
        { name: '湖北', value: 116 },
        { name: '湖南', value: 114 },
        { name: '重庆', value: 91 },
        { name: '四川', value: 125 },
        { name: '贵州', value: 62 },
        { name: '云南', value: 83 },
        { name: '西藏', value: 9 },
        { name: '陕西', value: 80 },
        { name: '甘肃', value: 56 },
        { name: '青海', value: 10 },
        { name: '宁夏', value: 18 },
        { name: '新疆', value: 180 },
        { name: '广东', value: 123 },
        { name: '广西', value: 59 },
        { name: '海南', value: 14 },
      ],
    };
  },
  mounted() {
    this.$nextTick(() => {
      this.init();
    });
  },
  methods: {
    convertData: function(data) {
      let res = [];
      for (let i = 0; i < data.length; i++) {
        let geoCoord = this.geoCoordMap[data[i].name];
        if (geoCoord) {
          res.push({
            name: data[i].name,
            value: geoCoord.concat(data[i].value),
          });
        }
      }
      return res;
    },
    init() {
      // 1实例化对象
      this.myChart = this.$echarts.init(this.$el);
      // 2. 指定配置项和数据

      // this.myChart.showLoading();
      // this.myChart.hideLoading();

      const option = {
        backgroundColor: {
          type: 'linear',
          x: 0,
          y: 0,
          x2: 1,
          y2: 1,
          colorStops: [
            {
              offset: 0,
              color: '#0f378f', // 0% 处的颜色
            },
            {
              offset: 1,
              color: '#00091a', // 100% 处的颜色
            },
          ],
          globalCoord: false, // 缺省为 false
        },
        title: {
          top: 20,
          text: '年度患者分布',
          subtext: '',
          x: 'center',
          textStyle: {
            color: '#ccc',
          },
        },

        tooltip: {
          trigger: 'item',
          formatter: function(params) {
            if (typeof params.value[2] == 'undefined') {
              return params.name + ' : ' + params.value;
            } else {
              return params.name + ' : ' + params.value[2];
            }
          },
        },
        /*   legend: {
            orient: 'vertical',
            y: 'bottom',
            x: 'right',
             data:['pm2.5'],
            textStyle: {
                color: '#fff'
            }
        },*/
        legend: {
          orient: 'vertical',
          y: 'bottom',
          x: 'right',
          data: ['pm2.5'],
          textStyle: {
            color: '#fff',
          },
        },
        visualMap: {
          show: false,
          min: 0,
          max: 500,
          left: 'left',
          top: 'bottom',
          text: ['高', '低'], // 文本，默认为数值文本
          calculable: true,
          seriesIndex: [1],
          inRange: {},
        },
        geo: {
          map: 'china',
          show: true,
          roam: true,
          label: {
            normal: {
              show: false,
            },
            emphasis: {
              show: false,
            },
          },
          itemStyle: {
            normal: {
              areaColor: '#3a7fd5',
              borderColor: '#0a53e9', //线
              shadowColor: '#092f8f', //外发光
              shadowBlur: 20,
            },
            emphasis: {
              areaColor: '#0a2dae', //悬浮区背景
            },
          },
        },
        series: [
          {
            symbolSize: 5,
            label: {
              normal: {
                formatter: '{b}',
                position: 'right',
                show: true,
              },
              emphasis: {
                show: true,
              },
            },
            itemStyle: {
              normal: {
                color: '#fff',
              },
            },
            name: 'light',
            type: 'scatter',
            coordinateSystem: 'geo',
            data: this.convertData(this.data),
          },
          {
            type: 'map',
            map: 'china',
            geoIndex: 0,
            aspectScale: 0.75, //长宽比
            showLegendSymbol: false, // 存在legend时显示
            label: {
              normal: {
                show: false,
              },
              emphasis: {
                show: false,
                textStyle: {
                  color: '#fff',
                },
              },
            },
            roam: true,
            itemStyle: {
              normal: {
                areaColor: '#031525',
                borderColor: '#FFFFFF',
              },
              emphasis: {
                areaColor: '#2B91B7',
              },
            },
            animation: false,
            data: this.data,
          },
          {
            name: 'Top 5',
            type: 'scatter',
            coordinateSystem: 'geo',
            symbol: 'pin',
            symbolSize: [50, 50],
            label: {
              normal: {
                show: true,
                textStyle: {
                  color: '#fff',
                  fontSize: 9,
                },
                formatter(value) {
                  return value.data.value[2];
                },
              },
            },
            itemStyle: {
              normal: {
                color: '#D8BC37', //标志颜色
              },
            },
            data: this.convertData(this.data),
            showEffectOn: 'render',
            rippleEffect: {
              brushType: 'stroke',
            },
            hoverAnimation: true,
            zlevel: 1,
          },
        ],
      };
      // 3. 把配置项给实例对象
      this.myChart.setOption(option);
      //4.让图表跟随屏幕自动的去适应
      window.addEventListener('resize', () => {
        this.myChart.resize();
      });
    },
  },
};
</script>

<style lang="css" scoped>
.china-map {
  height: 100%;
}
</style>
